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Male sexual reproduction - Coggle Diagram
Male sexual reproduction
Features
Ducts
Epididymis: sperm storage, final maturation to become mobile
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Urethra: urinary bladder to penis, conduit for semen and sperm
Glands
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Bulbourethral gland: pre-ejaculate, neutralize acidity
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Testes
Scrotum
Thin layer of skin and underlying fascia in 2 chambers lined be serous membrane that reduces friction, deep two tunica vaginalis is a dense CT capsule, extends into testes and divide into 200-300 compartments called lobules
Seminiferous tubules
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Between tubules blood vessel and Leydig cells, Leydig make testosterone
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Whole process
Sminiferous tubules, rete testes, efferent ducts, epididymis, ductus deferens
Spermatogenesis
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3 elements
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Spermatogonium (mitosis), Primary spermatocyte, (meiosis 1) secondary spermatocytes, (meiosis 2) spermatid
Spermiogenesis
Final stage, spermatid into spermatozoon
Development of acrosome: vesicle of digestive enzyme, help penetrate oocyte
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Condensation of nucleus: undergoes packaging, highly condensed protects DNA
Shedding of excess cytoplasm, taken up by Sertoli cells, better motility, mitochondria remain
Reproductive tracts
responsible for functional, maturation, nourishment, storage, and transportation
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Epididymis
Posterior side of testes, 7m long
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Recylcing centre for damaged sperm, reabsorbs and breaks down
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Functional maturation: epididymis secretes a variety of proteins that bind to sperm and stabalise sperm so it can withstand being cumshot, trigger flgelum to beat, sperm maturation dependent on androgens
Ductus Deferens
Begins epididymis tail/ joins spermatic chord, end enlarges to form ampula
Wall contains thick smooth muscle, periotic contractions propel sperm, can store sperm
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